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According to the structure form of beam-column-slab interior joints in longitudinal section of the assembled monolithic subway station, a full-scale prefabricated beam-column-slab interior joint (PMJ-2) and a full-scale cast-in-place concrete beam-column-slab interior joint (CMJ-2) for comparison were designed and fabricated. The failure mode, hysteretic characteristic, bearing capacity, deformation capacity and stress state of core zone of the joints etc. were studied through low-cycle reversed loading test. The results show that the deformation capacity of the two beam-column-slab interior joints is approximately the same, but the loading-stiffness of PMJ-2 is larger than that of CMJ-2 evidently. The displacement ductility coefficient of PMJ-2 is about 1.65 times of that of CMJ-2. The deformation capacity of the specimen PMJ-2 is improved by the seams between assembled components. The crack failure modes of the specimens are obviously different. The distribution of cracks of the cast-in-place concrete beam-column-slab interior joint are homogeneous, but the distribution of cracks of the precast concrete joint are localized. The main regions of cracks are distributed along the plastic zone of beam, slab and core zone of joint, but the distribution of cracks of the prefabricated beam-column-slab interior joint is concentrated around the lapped seam between precast part and cast-in-place part of layered slab. The supporting corbel of beam leads to the increase of shear area in the core zone of joint. Thus, the overall bearing capacity of the specimen is improved. The increased shear area of the core zone of joint and the present of splicing seam are beneficial for achieving the design idea 'strong-joint and weak-member'. © 2019, Editorial Office of Journal of Building Structures. All right reserved.
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